function getData() {
  return 'this is your data,爆炸困'
}
let res = getData();
console.log(res);

console.log('begin');
console.log(getData());
console.log('end');

// 变成异步函数
async function getData2() {
  return 'this is your data, it is async'
}
console.log('begin');
console.log(getData2());
console.log('end');